单选题The size of the discharge ring used for the efficient operation of a disk type purifier is dependent upon the（）Arated capacity of that purifierBviscosity of the oil being purifiedCmaximum design speed of that purifierDspecific gravity of the oil being purified
单选题
The size of the discharge ring used for the efficient operation of a disk type purifier is dependent upon the（）
A
rated capacity of that purifier
B
viscosity of the oil being purified
C
maximum design speed of that purifier
D
specific gravity of the oil being purified
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